Structured data is a new form of data tagging supported by Google, Yahoo, Bing and Facebook.
This set of tools provides you with various generators which once entered the correct data generate valid Schema and OpenGraph divs and metatags. Schema and OpenGraph tools are great for verifying your website and improving your search listing result across Google, Yahoo and Bing.
There are three examples of how Schema and OpenGraph tags benefit your search listing in the screenshots on this page.
It also comes with instructions on the various generators on how to correctly install them on certain pages.
It also includes a set of videos provided by Google Webmaster Tools plus links to the Official Structured Data testing tool.
Want to know more?
OpenGraph from Facebook
Schema.org Official Schema Website